Similarly, the message field (textarea) allows a max length of 6000 characters

<textarea name="Message" maxlength="6000" required></textarea>

using the built-in HTML5 validations has the advantage that the browser itself shows the error message.
You can customize those validations to fit your needs

File Upload Handling

For adding file upload support, first we need to add enctype attribute to the form tag:
enctype="multipart/form-data"

Then, upload fields are added using input of type 'file'

<input type="file" name="image" required />

Server Side Handling

Every form requires a server side script to collect the form data and do the processing like send emails, save to database etc. This form comes with a PHP script to handle the form submissions. PHP is widely supported server side scripting platform.